(Q26985444)

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Recommendation Q.921 (11/1988): ISDN user-network interface - Data link layer specification

superseded recommendation/international standard from the International Telecommunication Union

ITU-T Q.921
ITU-T I.441

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ITU-T recommendation version

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title

ISDN user-network interface - Data link layer specification (English)

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edition number

11/1988

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publisher

ITU Telecommunication Standardization Sector

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language of work or name

English

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publication date

25 November 1988

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number of pages

118

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official website

http://www.itu.int/rec/T-REC-Q.921-198811-S/en

language of work or name

English

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full work available at URL

https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-Q.921-198811-S!!PDF-E&type=items

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standards body

International Telecommunication Union

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cites work

Recommendation I.430 (11/1988): Basic user-network interface - Layer 1 specification

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Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification

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Recommendation Q.920 (11/1988): ISDN user-network interface data link layer - General aspects

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Recommendation Q.930 (11/1988): ISDN user-network interface layer 3 - General aspects

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Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control

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Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)

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Recommendation X.2 (11/1988): International data transmission services and optional user facilities in public data networks and ISDNs

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Recommendation X.25 (11/1988): Interface between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) for terminals operating in the packet mode and connected to public data networks by dedicated circuit

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Recommendation X.3 (11/1988): Packet assembly/disassembly facility (PAD) in a public data network

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Recommendation X.4 (11/1988): General structure of signals of International Alphabet No. 5 code for character oriented data transmission over public data networks

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Recommendation X.5 (02/1992): Facsimile Packet Assembly/Disassembly facility (FPAD) in a public data network

(Q26985444)

Recommendation Q.921 (11/1988): ISDN user-network interface - Data link layer specification

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